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Well known and popular quaking grass forming tight mounds of foliage and many delicate, quaking flowerheads that bob in the wind. Short lived perennial. Sun or light shade. Height 50cm-70cm. Semi-evergreen. Native
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Calamgrostis Brachytricha forms low mounds of soft green foliage with stunning feathery plumes of greyish pink flowers held high above the foliage in late summer. Sunny open position. Always does well at Knoll. Height 90cm-1.2m. Deciduous
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Calamagrostis Karl Foerster forms mounds of green foliage with many spectacular strongly vertical flower stems bleaching to beautiful straw colour late in the season. Very architectural and superb for informal screening. Sunny open spot. Height 1.6m -1.8m. Deciduous
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Calamagrostis Overdam - Highly impressive mounds of green & white striped leaves setting off the pinkish feathery plumes of flower. Sunny open spot. Height 1.4m-1.5m. Deciduous
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A rather new form probably a little shorter than the well known C.Karl Foerster forming dark green mounds of foliage topped by very upright flowers that are especially effective en masse. Sunny open spot. Height 1.5m-1.7m Deciduous
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Carex Ice Dance has green leaves edged with narrow creamy white margins making gradually spreading mounds. Ideal for ground cover in sun or part shade. Height 25cm-30cm. Evergreen.
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Tufted Hair Grass. Forms neat mounds of dark green foliage completely obscured from summer onwards by billowing masses of cloud like flowers. Soil not too dry. Sunny or light shade. Height 90cm-1.2m. Deciduous. Native
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A form of our native tufted hair grass with dark green foliage and selected for its flowering stems at the shorter range of the species. Soil not too dry Sun,part shade. Height 80cm-90cm. Deciduous
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A form of native tufted hair grass selected at Knoll Gardens for its large mounds of healthy green foliage and tall flower stems. Sun or light shade. Soil not too dry. Height 1m - 1.2m. Deciduous. Native
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First class form of D.cespitosa with robust, dark green clumps of foliage supporting comparatively tall sturdy flowers. An excellent selection made in Scotland. Soil not too dry. Sun or light shade. Height to 1m - 1.2m. Deciduous
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Superb silver-blue comparatively wide foliage forming slowly spreading clumps and is amongst the most blue of the blue grasses. Sunny open position. Height 40cm-50cm. Deciduous
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Tufts of finely textured blue green foliage topped with violet tinted purplish flowers during early summer. Flower stems often colour well as flower colour fades. Sunny open spot. Height 40cm-60cm. Evergreen
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Recent selection with, as its name suggests, bright yellow gold leaves without any trace of green. Slowly spreading mounds are happiest in some shade. Part shade ideal. Height 30cm-45cm. Deciduous
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Magnificent grass with attractive gold variegated ribbon like foliage forming simply divine mounds. Excellent cover in shade and stunning in a large pot. Brighter yellow in sun more lime yellow in part shade. Height 30cm-45cm. Deciduous
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Perfectly named Japanese blood grass with foliage that turns gradually blood red as the season progresses. Genuinely stunning plant. Sunny open spot. Height 30cm-40cm. Deciduous
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Miscanthus Ferner Osten is a superb ornamental grass selection forming mounds of narrow foliage turning bright copper and red in autumn. Spectacular very dark red flower plumes. Sunny open spot. Height 1.6m-1.8m. Deciduous
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Miscanthus Gracillimus is an old established cultivar grown principally for its fine textured foliage forming gracefully rounded mounds bleaching to pale straw colour for a winter feature. Sunny spot . Height 1.8m-2.1m . Deciduous
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Perfectly named, for its upright stems and gracefully arching fine textured cream and green foliage give this form an unequalled lightness. Topped with perfectly matched pinkish flowers in good years. Refined and elegant in pots or by waters edge. Sunny open spot. Height 1.5m-1.8m. Deciduous
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Extremely unusual and very beautiful having delicate looking airy flower plumes held high above mounds of green foliage from mid-summer onwards. Looks fantastic in our gravel garden even in winter. Needs a sheltered spot. Sunny well drained. Height 1.2m-1.5m. Deciduous
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Selected from M.caerulea for its incredible rich purple almost black flower stems and dense flower spikes profusely produced from tussocks of good green foliage. Great for winter effect. Sunny open spot. Height 90cm-1.1m Deciduous
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Form of O.planiscapus with gradually spreading clumps of highly unusual strap-shaped black leaves all year with occasional shiny blue black berries in autumn. Sun, part shade. Height 15cm-25cm. Evergreen
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Heavy Metal is a first class selection of P.virgatum and has clumps of very upright grey green foliage with large panicles of tiny purplish spikelets in summer. Eye catching en masse in the Knoll Decennium border. Sunny open spot. Height 1.2m-1.5m. Deciduous
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Lovely form with green & purple foliage & heads of purple flowers which will flower freely in an open situation all summer. Good in sunny open position. Height 1.1m-1.4m. Deciduous
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One of the most exciting new cultivars in recent years. Chosen for its early flowering ability and comparatively large individual flowers which open distinctly red fading through purple shades to beige. Great perfomer in our mill end borders. Sunny well drained spot. Height 80cm-1m. Deciduous
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Beautiful plant with clumps of light green foliage & masses of large furry caterpillar like flowers colouring buff white. Dramatic in full flower when planted in a pot or en masse. Reasonably hardy if in Sunny well drained spot. Height 50cm-80cm. Deciduous
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Large mounds of steely blue narrow foliage & a succession of silvery blue attractive flowerheads during summer. Sunny open spot. Height 90cm-1.2m. Deciduous
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Blue Moor grass. Much under used attractive native grown chiefly for its foliage and forming tidy mounds of blue green leaves being distinctly lighter glaucous blue on the upper surface and darker green below. Drought tolerant in sun or light shade. Height 15cm-20cm. Evergreen. Native
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A most interesting cultivated selection forming bright green mounds topped with many soft whiteish flowers during summer. Happy in sun or light shade. Soil no too wet. Height 20cm - 30cm. Semi-evergreen
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